ReFaXi 20 Pcs Silver Comfort Fit Butterfly Clutch Metal Pin Backs Replacement Material: Tinplate Size: Approx. 0.46*0.46*0.23 inch / 1.17*1.17*0.58cm Great replacement for lost backs badges, name tags etc. Allow you to install and remove it easily, handy and convenient for use 20pcs Butterfly clasps, ideal for badges, tie, hat and various fixings